Speaker cables with good timbre

OP copper, that have a very good midrange, imaging and truth of timbre or faithful reproduction of instrument sound.

Wavetouch audio speaker cable. Listen WTA cable how close the real voice and recorded voice below. Alex / WTA

https://youtu.be/2ru4D-mOMdo?si=PLh0_Cvg_GLLhbwl

The cable Devon Turnbull sells on his Ojas site is really excellent. I think it excels at the qualities you’re looking for. It’s not terminated but I can’t imagine you’d find better anywhere near this price. 

Audience AU24SX or FrontRow. They have a natural tone, are highly resolving but never bright. I tried many speaker cables and the FrontRow are by far the best I ever heard.

I have 2 sets of these, and I concur. My Magnepan Mini (and LRS+) did not seem to benefit as much as all other speakers with the FrontRow.

I did a comparison with the AU24SX and the FrontRow speaker cables. If your system is very resolving then you can hear some harshness with the AU24SX, nothing bad on the FrontRow.

I use a 10 AWG speaker cable from Blue Jean Cables for the Magnepan Mini. One set of my FrontRow speaker cables sit idle for now.

I was at the same point quite a few years ago ... looking for speaker cables with great timbre. Auditioned a number of brands over about a 3-month period. Installed Gregg Straley Reality speaker cables, got off the merry-go-round, and never looked back. Note: they're still in business but have not updated website in quite a few years (says "Not Secure"). YMMV

Happy Listening!

i would buy and make your own the GR research cable kits superior performance yet low cost ( a pair of 4' are i believe less than $100! ) 
they will surpass most all others